Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/m68k/sun3/config.c |
| 3 | * |
| 4 | * Copyright (C) 1996,1997 Pekka Pietik{inen |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file COPYING in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/config.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/tty.h> |
| 16 | #include <linux/console.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/bootmem.h> |
| 19 | |
| 20 | #include <asm/oplib.h> |
| 21 | #include <asm/setup.h> |
| 22 | #include <asm/contregs.h> |
| 23 | #include <asm/movs.h> |
| 24 | #include <asm/pgtable.h> |
| 25 | #include <asm/sun3-head.h> |
| 26 | #include <asm/sun3mmu.h> |
| 27 | #include <asm/rtc.h> |
| 28 | #include <asm/machdep.h> |
| 29 | #include <asm/intersil.h> |
| 30 | #include <asm/irq.h> |
| 31 | #include <asm/segment.h> |
| 32 | #include <asm/sun3ints.h> |
| 33 | |
| 34 | extern char _text, _end; |
| 35 | |
| 36 | char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; |
| 37 | |
| 38 | extern unsigned long sun3_gettimeoffset(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | extern void sun3_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); |
| 40 | extern void sun3_get_model (char* model); |
| 41 | extern void idprom_init (void); |
| 42 | extern int sun3_hwclk(int set, struct rtc_time *t); |
| 43 | |
| 44 | volatile char* clock_va; |
| 45 | extern volatile unsigned char* sun3_intreg; |
| 46 | extern unsigned long availmem; |
| 47 | unsigned long num_pages; |
| 48 | |
| 49 | static int sun3_get_hardware_list(char *buffer) |
| 50 | { |
| 51 | |
| 52 | int len = 0; |
| 53 | |
| 54 | len += sprintf(buffer + len, "PROM Revision:\t%s\n", |
| 55 | romvec->pv_monid); |
| 56 | |
| 57 | return len; |
| 58 | |
| 59 | } |
| 60 | |
| 61 | void __init sun3_init(void) |
| 62 | { |
| 63 | unsigned char enable_register; |
| 64 | int i; |
| 65 | |
| 66 | m68k_machtype= MACH_SUN3; |
| 67 | m68k_cputype = CPU_68020; |
| 68 | m68k_fputype = FPU_68881; /* mc68881 actually */ |
| 69 | m68k_mmutype = MMU_SUN3; |
| 70 | clock_va = (char *) 0xfe06000; /* dark */ |
| 71 | sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */ |
| 72 | sun3_disable_interrupts(); |
| 73 | |
| 74 | prom_init((void *)LINUX_OPPROM_BEGVM); |
| 75 | |
| 76 | GET_CONTROL_BYTE(AC_SENABLE,enable_register); |
| 77 | enable_register |= 0x50; /* Enable FPU */ |
| 78 | SET_CONTROL_BYTE(AC_SENABLE,enable_register); |
| 79 | GET_CONTROL_BYTE(AC_SENABLE,enable_register); |
| 80 | |
| 81 | /* This code looks suspicious, because it doesn't subtract |
| 82 | memory belonging to the kernel from the available space */ |
| 83 | |
| 84 | |
| 85 | memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg)); |
| 86 | |
| 87 | /* Reserve important PMEGS */ |
| 88 | /* FIXME: These should be probed instead of hardcoded */ |
| 89 | |
| 90 | for (i=0; i<8; i++) /* Kernel PMEGs */ |
| 91 | sun3_reserved_pmeg[i] = 1; |
| 92 | |
| 93 | sun3_reserved_pmeg[247] = 1; /* ROM mapping */ |
| 94 | sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */ |
| 95 | sun3_reserved_pmeg[251] = 1; /* VB area */ |
| 96 | sun3_reserved_pmeg[254] = 1; /* main I/O */ |
| 97 | |
| 98 | sun3_reserved_pmeg[249] = 1; |
| 99 | sun3_reserved_pmeg[252] = 1; |
| 100 | sun3_reserved_pmeg[253] = 1; |
| 101 | set_fs(KERNEL_DS); |
| 102 | } |
| 103 | |
| 104 | /* Without this, Bad Things happen when something calls arch_reset. */ |
| 105 | static void sun3_reboot (void) |
| 106 | { |
| 107 | prom_reboot ("vmlinux"); |
| 108 | } |
| 109 | |
| 110 | static void sun3_halt (void) |
| 111 | { |
| 112 | prom_halt (); |
| 113 | } |
| 114 | |
| 115 | /* sun3 bootmem allocation */ |
| 116 | |
| 117 | void __init sun3_bootmem_alloc(unsigned long memory_start, unsigned long memory_end) |
| 118 | { |
| 119 | unsigned long start_page; |
| 120 | |
| 121 | /* align start/end to page boundaries */ |
| 122 | memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK); |
| 123 | memory_end = memory_end & PAGE_MASK; |
| 124 | |
| 125 | start_page = __pa(memory_start) >> PAGE_SHIFT; |
| 126 | num_pages = __pa(memory_end) >> PAGE_SHIFT; |
| 127 | |
| 128 | high_memory = (void *)memory_end; |
| 129 | availmem = memory_start; |
| 130 | |
| 131 | availmem += init_bootmem_node(NODE_DATA(0), start_page, 0, num_pages); |
| 132 | availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK; |
| 133 | |
| 134 | free_bootmem(__pa(availmem), memory_end - (availmem)); |
| 135 | } |
| 136 | |
| 137 | |
| 138 | void __init config_sun3(void) |
| 139 | { |
| 140 | unsigned long memory_start, memory_end; |
| 141 | |
| 142 | printk("ARCH: SUN3\n"); |
| 143 | idprom_init(); |
| 144 | |
| 145 | /* Subtract kernel memory from available memory */ |
| 146 | |
| 147 | mach_sched_init = sun3_sched_init; |
| 148 | mach_init_IRQ = sun3_init_IRQ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | mach_reset = sun3_reboot; |
| 150 | mach_gettimeoffset = sun3_gettimeoffset; |
| 151 | mach_get_model = sun3_get_model; |
| 152 | mach_hwclk = sun3_hwclk; |
| 153 | mach_halt = sun3_halt; |
| 154 | mach_get_hardware_list = sun3_get_hardware_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | memory_start = ((((int)&_end) + 0x2000) & ~0x1fff); |
| 157 | // PROM seems to want the last couple of physical pages. --m |
| 158 | memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE; |
| 159 | |
| 160 | m68k_num_memory=1; |
| 161 | m68k_memory[0].size=*(romvec->pv_sun3mem); |
| 162 | |
| 163 | sun3_bootmem_alloc(memory_start, memory_end); |
| 164 | } |
| 165 | |
| 166 | void __init sun3_sched_init(irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) |
| 167 | { |
| 168 | sun3_disable_interrupts(); |
| 169 | intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE); |
| 170 | intersil_clock->int_reg=INTERSIL_HZ_100_MASK; |
| 171 | intersil_clear(); |
| 172 | sun3_enable_irq(5); |
| 173 | intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE); |
| 174 | sun3_enable_interrupts(); |
| 175 | intersil_clear(); |
| 176 | } |
| 177 | |